Patent US2997745A successfully refreshed from Google Patents.
US2997745A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing abrasionresistant plastic articles
Assignee: Rohm and Haas Co
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Filing: 1958-01-14
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Granted: 1961-08-29
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Expires: 1978-01-14
Abstract
No abstract record available.
Inventors
- 👤 Edwin H Kroeker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:31
CPC Classifications
C; C08; C08F; C08F265/00; C08F265/04; C08F265/06; B; B29; B29C; B29C37/00; B29C37/0025; B29C37/0028; B29C37/0032; B29C39/00; B29C39/003; B29C39/006; B29D; B29D7/00; B29D7/01; C08F20/00; C08F20/02; C08F20/10; C08F20/20; B29K; B29K2023/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
172 words
A PROCESS COMPRISING APPLYING A SOLUTION OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF DIETHYLENE GLYCOL DIMETHACRYLATE, TRIETHYLENE GLYCOL DIMETHACRYLATE, AND DIMETHACRYLATES OF ALKANEDIOLS HAVING 3 TO 6 CARBON ATOMS, A MIXTURE OF AT LEAST TWO OF THESE DIMETHACRYLATES, AND A SOLUBLE POLYMER OF MOLECULES CONSISTING OF AT LEAST ONE OF THESE DIMETHACRYLATES TO THE INWARDLY-FACING SURFACE OF A MEMBER OF A CASTING MOLD, DRYING THE SOLUTION TO DEPOSIT A FILM OF A POLYMER OF AT LEAST ONE OF THE AFORESAID DIMETHACRYLATES, THEN APPLYING IN CONTACT WITH THE SURFACE OF THE FILM OF THE POLYMER A MIXTURE OF A METHACRYLIC ACID ESTER OF A LOWER ALCOHOL AND A POLYMERIZATION INITIATOR, CLOSING THE MOLD, AND HEATING THE CONTENT OF THE MOLD TO A TEMPERATURE OF 60*C. TO 150*C. WHILE MAINTAINING THE MOLD CLOSED TO EXCLUDE AIR THEREFROM TO SIMULTANEOUSLY EFFECT POLYMERIZATION OF THE METHACRYLIC ACID ESTER AND FURTHER POLYMERIZATION OF THE DIMETHACRYLATE IN CONTACT THEREWITH TO FORM AN INTEGRAL CASTING THEREFROM WITH THE DIMETHACRYLATE POLYMER ON AN EXTERNAL SURFACE OF THE CASTING.
Claim 2
Dependent Claim
172 words
A PROCESS COMPRISING APPLYING A SOLUTION OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF DIETHYLENE GLYCOL DIMETHACRYLATE, TRIETHYLENE GLYCOL DIMETHACRYLATE, AND DIMETHACRYLATES OF ALKANEDIOLS HAVING 3 TO 6 CARBON ATOMS, A MIXTURE OF AT LEAST TWO OF THESE DIMETHACRYLATES, AND A SOLUBLE POLYMER OF MOLECULES CONSISTING OF AT LEAST ONE OF THESE DIMETHACRYLATES TO THE INWARDLY-FACING SURFACE OF A MEMBER OF A CASTING MOLD, DRYING THE SOLUTION TO DEPOSIT A FILM OF A POLYMER OF AT LEAST ONE OF THE AFORESAID DIMETHACRYLATES, THEN APPLYING IN CONTACT WITH THE SURFACE OF THE FILM OF THE POLYMER A MIXTURE OF A METHACRYLIC ACID ESTER OF A LOWER ALCOHOL AND A POLYMERIZATION INITIATOR, CLOSING THE MOLD, AND HEATING THE CONTENT OF THE MOLD TO A TEMPERATURE OF 60*C. TO 150*C. WHILE MAINTAINING THE MOLD CLOSED TO EXCLUDE AIR THEREFROM TO SIMULTANEOUSLY EFFECT POLYMERIZATION OF THE METHACRYLIC ACID ESTER AND FURTHER POLYMERIZATION OF THE DIMETHACRYLATE IN CONTACT THEREWITH TO FORM AN INTEGRAL CASTING THEREFROM WITH THE DIMETHACRYLATE POLYMER ON AN EXTERNAL SURFACE OF THE CASTING.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-28 | 1965-02-27 | 1965-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-28 | 1969-02-27 | 1969-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-28 | 1973-02-27 | 1973-08-29 | $7700.00 | Window Closed / Lapsed |